z/VSE can access a SCSI disk through a port (CHPID) of an IBM System z Fibre Channel Protocol (FCP) adapter. One z/VSE system may connect to one physical port or multiple systems may share one physical port with N-Port ID Virtualization (NPIV).
Today a few words about NPIV . Thanks to my colleague Monika for details.
With NPIV the FCP adapters (CHPIDs) can be shared by multiple operating systems.
The Service Element (SE) creates new worldwide port names (WWPNs - identifies the port in a storage network) for the FCP adapter.... [More]